// Formatting library for C++ - the core API
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.

#ifndef FMT_CORE_H_
#define FMT_CORE_H_

#include <cassert>
#include <cstdio> // std::FILE
#include <cstring>
#include <iterator>
#include <string>
#include <type_traits>

// The fmt library version in the form major * 10000 + minor * 100 + patch.
#define FMT_VERSION 50300

#ifdef __has_feature
#define FMT_HAS_FEATURE(x) __has_feature(x)
#else
#define FMT_HAS_FEATURE(x) 0
#endif

#if defined(__has_include) && !defined(__INTELLISENSE__) &&                    \
    !(defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1600)
#define FMT_HAS_INCLUDE(x) __has_include(x)
#else
#define FMT_HAS_INCLUDE(x) 0
#endif

#ifdef __has_cpp_attribute
#define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
#else
#define FMT_HAS_CPP_ATTRIBUTE(x) 0
#endif

#if defined(__GNUC__) && !defined(__clang__)
#define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
#else
#define FMT_GCC_VERSION 0
#endif

#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
#define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION
#else
#define FMT_HAS_GXX_CXX11 0
#endif

#ifdef _MSC_VER
#define FMT_MSC_VER _MSC_VER
#else
#define FMT_MSC_VER 0
#endif

// Check if relaxed C++14 constexpr is supported.
// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
#ifndef FMT_USE_CONSTEXPR
#define FMT_USE_CONSTEXPR                                                      \
    (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1910 ||          \
     (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L))
#endif
#if FMT_USE_CONSTEXPR
#define FMT_CONSTEXPR constexpr
#define FMT_CONSTEXPR_DECL constexpr
#else
#define FMT_CONSTEXPR inline
#define FMT_CONSTEXPR_DECL
#endif

#ifndef FMT_USE_CONSTEXPR11
#define FMT_USE_CONSTEXPR11                                                    \
    (FMT_USE_CONSTEXPR || FMT_GCC_VERSION >= 406 || FMT_MSC_VER >= 1900)
#endif
#if FMT_USE_CONSTEXPR11
#define FMT_CONSTEXPR11 constexpr
#else
#define FMT_CONSTEXPR11
#endif

#ifndef FMT_OVERRIDE
#if FMT_HAS_FEATURE(cxx_override) ||                                           \
    (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
#define FMT_OVERRIDE override
#else
#define FMT_OVERRIDE
#endif
#endif

#if FMT_HAS_FEATURE(cxx_explicit_conversions) || FMT_GCC_VERSION >= 405 ||     \
    FMT_MSC_VER >= 1800
#define FMT_USE_EXPLICIT 1
#define FMT_EXPLICIT explicit
#else
#define FMT_USE_EXPLICIT 0
#define FMT_EXPLICIT
#endif

#ifndef FMT_NULL
#if FMT_HAS_FEATURE(cxx_nullptr) ||                                            \
    (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1600
#define FMT_NULL nullptr
#define FMT_USE_NULLPTR 1
#else
#define FMT_NULL NULL
#endif
#endif
#ifndef FMT_USE_NULLPTR
#define FMT_USE_NULLPTR 0
#endif

// Check if exceptions are disabled.
#ifndef FMT_EXCEPTIONS
#if (defined(__GNUC__) && !defined(__EXCEPTIONS)) ||                           \
    FMT_MSC_VER && !_HAS_EXCEPTIONS
#define FMT_EXCEPTIONS 0
#else
#define FMT_EXCEPTIONS 1
#endif
#endif

// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
#ifndef FMT_USE_NOEXCEPT
#define FMT_USE_NOEXCEPT 0
#endif

#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) ||                       \
    (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
#define FMT_DETECTED_NOEXCEPT noexcept
#define FMT_HAS_CXX11_NOEXCEPT 1
#else
#define FMT_DETECTED_NOEXCEPT throw()
#define FMT_HAS_CXX11_NOEXCEPT 0
#endif

#ifndef FMT_NOEXCEPT
#if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT
#define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
#else
#define FMT_NOEXCEPT
#endif
#endif

#ifndef FMT_BEGIN_NAMESPACE
#if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 ||        \
    FMT_MSC_VER >= 1900
#define FMT_INLINE_NAMESPACE inline namespace
#define FMT_END_NAMESPACE                                                      \
    }                                                                          \
    }
#else
#define FMT_INLINE_NAMESPACE namespace
#define FMT_END_NAMESPACE                                                      \
    }                                                                          \
    using namespace v5;                                                        \
    }
#endif
#define FMT_BEGIN_NAMESPACE                                                    \
    namespace fmt {                                                            \
    FMT_INLINE_NAMESPACE v5 {
#endif

#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
#ifdef FMT_EXPORT
#define FMT_API __declspec(dllexport)
#elif defined(FMT_SHARED)
#define FMT_API __declspec(dllimport)
#endif
#endif
#ifndef FMT_API
#define FMT_API
#endif

#ifndef FMT_ASSERT
#define FMT_ASSERT(condition, message) assert((condition) && message)
#endif

// libc++ supports string_view in pre-c++17.
#if (FMT_HAS_INCLUDE(<string_view>) &&                                         \
     (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) ||                   \
    (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
#include <string_view>
#define FMT_STRING_VIEW std::basic_string_view
#elif FMT_HAS_INCLUDE(<experimental / string_view>) && __cplusplus >= 201402L
#include <experimental/string_view>
#define FMT_STRING_VIEW std::experimental::basic_string_view
#endif

// std::result_of is defined in <functional> in gcc 4.4.
#if FMT_GCC_VERSION && FMT_GCC_VERSION <= 404
#include <functional>
#endif

FMT_BEGIN_NAMESPACE
namespace internal {

// An implementation of declval for pre-C++11 compilers such as gcc 4.
template <typename T>
typename std::add_rvalue_reference<T>::type declval() FMT_NOEXCEPT;

template <typename>
struct result_of;

template <typename F, typename... Args>
struct result_of<F(Args...)> {
    // A workaround for gcc 4.4 that doesn't allow F to be a reference.
    typedef typename std::result_of<typename std::remove_reference<F>::type(
        Args...)>::type type;
};

// Casts nonnegative integer to unsigned.
template <typename Int>
FMT_CONSTEXPR typename std::make_unsigned<Int>::type to_unsigned(Int value) {
    FMT_ASSERT(value >= 0, "negative value");
    return static_cast<typename std::make_unsigned<Int>::type>(value);
}

/** A contiguous memory buffer with an optional growing ability. */
template <typename T>
class basic_buffer {
  private:
    basic_buffer(const basic_buffer&) = delete;
    void operator=(const basic_buffer&) = delete;

    T* ptr_;
    std::size_t size_;
    std::size_t capacity_;

  protected:
    // Don't initialize ptr_ since it is not accessed to save a few cycles.
    basic_buffer(std::size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {}

    basic_buffer(T* p = FMT_NULL, std::size_t sz = 0,
                 std::size_t cap = 0) FMT_NOEXCEPT : ptr_(p),
                                                     size_(sz),
                                                     capacity_(cap) {}

    /** Sets the buffer data and capacity. */
    void set(T* buf_data, std::size_t buf_capacity) FMT_NOEXCEPT {
        ptr_ = buf_data;
        capacity_ = buf_capacity;
    }

    /** Increases the buffer capacity to hold at least *capacity* elements. */
    virtual void grow(std::size_t capacity) = 0;

  public:
    typedef T value_type;
    typedef const T& const_reference;

    virtual ~basic_buffer() {}

    T* begin() FMT_NOEXCEPT { return ptr_; }
    T* end() FMT_NOEXCEPT { return ptr_ + size_; }

    /** Returns the size of this buffer. */
    std::size_t size() const FMT_NOEXCEPT { return size_; }

    /** Returns the capacity of this buffer. */
    std::size_t capacity() const FMT_NOEXCEPT { return capacity_; }

    /** Returns a pointer to the buffer data. */
    T* data() FMT_NOEXCEPT { return ptr_; }

    /** Returns a pointer to the buffer data. */
    const T* data() const FMT_NOEXCEPT { return ptr_; }

    /**
      Resizes the buffer. If T is a POD type new elements may not be
      initialized.
     */
    void resize(std::size_t new_size) {
        reserve(new_size);
        size_ = new_size;
    }

    /** Clears this buffer. */
    void clear() { size_ = 0; }

    /** Reserves space to store at least *capacity* elements. */
    void reserve(std::size_t new_capacity) {
        if (new_capacity > capacity_)
            grow(new_capacity);
    }

    void push_back(const T& value) {
        reserve(size_ + 1);
        ptr_[size_++] = value;
    }

    /** Appends data to the end of the buffer. */
    template <typename U>
    void append(const U* begin, const U* end);

    T& operator[](std::size_t index) { return ptr_[index]; }
    const T& operator[](std::size_t index) const { return ptr_[index]; }
};

typedef basic_buffer<char> buffer;
typedef basic_buffer<wchar_t> wbuffer;

// A container-backed buffer.
template <typename Container>
class container_buffer : public basic_buffer<typename Container::value_type> {
  private:
    Container& container_;

  protected:
    void grow(std::size_t capacity) FMT_OVERRIDE {
        container_.resize(capacity);
        this->set(&container_[0], capacity);
    }

  public:
    explicit container_buffer(Container& c)
        : basic_buffer<typename Container::value_type>(c.size()),
          container_(c) {}
};

// Extracts a reference to the container from back_insert_iterator.
template <typename Container>
inline Container& get_container(std::back_insert_iterator<Container> it) {
    typedef std::back_insert_iterator<Container> bi_iterator;
    struct accessor : bi_iterator {
        accessor(bi_iterator iter) : bi_iterator(iter) {}
        using bi_iterator::container;
    };
    return *accessor(it).container;
}

struct error_handler {
    FMT_CONSTEXPR error_handler() {}
    FMT_CONSTEXPR error_handler(const error_handler&) {}

    // This function is intentionally not constexpr to give a compile-time
    // error.
    FMT_API void on_error(const char* message);
};

template <typename T>
struct no_formatter_error : std::false_type {};
} // namespace internal

#if FMT_GCC_VERSION && FMT_GCC_VERSION < 405
template <typename... T>
struct is_constructible : std::false_type {};
#else
template <typename... T>
struct is_constructible : std::is_constructible<T...> {};
#endif

/**
  An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
  subset of the API. ``fmt::basic_string_view`` is used for format strings even
  if ``std::string_view`` is available to prevent issues when a library is
  compiled with a different ``-std`` option than the client code (which is not
  recommended).
 */
template <typename Char>
class basic_string_view {
  private:
    const Char* data_;
    size_t size_;

  public:
    typedef Char char_type;
    typedef const Char* iterator;

    FMT_CONSTEXPR basic_string_view() FMT_NOEXCEPT : data_(FMT_NULL),
                                                     size_(0) {}

    /** Constructs a string reference object from a C string and a size. */
    FMT_CONSTEXPR basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT
        : data_(s),
          size_(count) {}

    /**
      \rst
      Constructs a string reference object from a C string computing
      the size with ``std::char_traits<Char>::length``.
      \endrst
     */
    basic_string_view(const Char* s)
        : data_(s), size_(std::char_traits<Char>::length(s)) {}

    /** Constructs a string reference from a ``std::basic_string`` object. */
    template <typename Alloc>
    FMT_CONSTEXPR
    basic_string_view(const std::basic_string<Char, Alloc>& s) FMT_NOEXCEPT
        : data_(s.data()),
          size_(s.size()) {}

#ifdef FMT_STRING_VIEW
    FMT_CONSTEXPR basic_string_view(FMT_STRING_VIEW<Char> s) FMT_NOEXCEPT
        : data_(s.data()),
          size_(s.size()) {}
#endif

    /** Returns a pointer to the string data. */
    FMT_CONSTEXPR const Char* data() const { return data_; }

    /** Returns the string size. */
    FMT_CONSTEXPR size_t size() const { return size_; }

    FMT_CONSTEXPR iterator begin() const { return data_; }
    FMT_CONSTEXPR iterator end() const { return data_ + size_; }

    FMT_CONSTEXPR void remove_prefix(size_t n) {
        data_ += n;
        size_ -= n;
    }

    // Lexicographically compare this string reference to other.
    int compare(basic_string_view other) const {
        size_t str_size = size_ < other.size_ ? size_ : other.size_;
        int result =
            std::char_traits<Char>::compare(data_, other.data_, str_size);
        if (result == 0)
            result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
        return result;
    }

    friend bool operator==(basic_string_view lhs, basic_string_view rhs) {
        return lhs.compare(rhs) == 0;
    }
    friend bool operator!=(basic_string_view lhs, basic_string_view rhs) {
        return lhs.compare(rhs) != 0;
    }
    friend bool operator<(basic_string_view lhs, basic_string_view rhs) {
        return lhs.compare(rhs) < 0;
    }
    friend bool operator<=(basic_string_view lhs, basic_string_view rhs) {
        return lhs.compare(rhs) <= 0;
    }
    friend bool operator>(basic_string_view lhs, basic_string_view rhs) {
        return lhs.compare(rhs) > 0;
    }
    friend bool operator>=(basic_string_view lhs, basic_string_view rhs) {
        return lhs.compare(rhs) >= 0;
    }
};

typedef basic_string_view<char> string_view;
typedef basic_string_view<wchar_t> wstring_view;

/**
  \rst
  The function ``to_string_view`` adapts non-intrusively any kind of string or
  string-like type if the user provides a (possibly templated) overload of
  ``to_string_view`` which takes an instance of the string class
  ``StringType<Char>`` and returns a ``fmt::basic_string_view<Char>``.
  The conversion function must live in the very same namespace as
  ``StringType<Char>`` to be picked up by ADL. Non-templated string types
  like f.e. QString must return a ``basic_string_view`` with a fixed matching
  char type.

  **Example**::

    namespace my_ns {
    inline string_view to_string_view(const my_string &s) {
      return {s.data(), s.length()};
    }
    }

    std::string message = fmt::format(my_string("The answer is {}"), 42);
  \endrst
 */
template <typename Char>
inline basic_string_view<Char> to_string_view(basic_string_view<Char> s) {
    return s;
}

template <typename Char>
inline basic_string_view<Char>
to_string_view(const std::basic_string<Char>& s) {
    return s;
}

template <typename Char>
inline basic_string_view<Char> to_string_view(const Char* s) {
    return s;
}

#ifdef FMT_STRING_VIEW
template <typename Char>
inline basic_string_view<Char> to_string_view(FMT_STRING_VIEW<Char> s) {
    return s;
}
#endif

// A base class for compile-time strings. It is defined in the fmt namespace to
// make formatting functions visible via ADL, e.g. format(fmt("{}"), 42).
struct compile_string {};

template <typename S>
struct is_compile_string : std::is_base_of<compile_string, S> {};

template <typename S, typename Enable = typename std::enable_if<
                          is_compile_string<S>::value>::type>
FMT_CONSTEXPR basic_string_view<typename S::char_type>
to_string_view(const S& s) {
    return s;
}

template <typename Context>
class basic_format_arg;

template <typename Context>
class basic_format_args;

// A formatter for objects of type T.
template <typename T, typename Char = char, typename Enable = void>
struct formatter {
    static_assert(internal::no_formatter_error<T>::value,
                  "don't know how to format the type, include fmt/ostream.h if "
                  "it provides "
                  "an operator<< that should be used");

    // The following functions are not defined intentionally.
    template <typename ParseContext>
    typename ParseContext::iterator parse(ParseContext&);
    template <typename FormatContext>
    auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out());
};

template <typename T, typename Char, typename Enable = void>
struct convert_to_int
    : std::integral_constant<bool, !std::is_arithmetic<T>::value &&
                                       std::is_convertible<T, int>::value> {};

namespace internal {

struct dummy_string_view {
    typedef void char_type;
};
dummy_string_view to_string_view(...);
using fmt::v5::to_string_view;

// Specifies whether S is a string type convertible to fmt::basic_string_view.
template <typename S>
struct is_string
    : std::integral_constant<
          bool, !std::is_same<dummy_string_view,
                              decltype(to_string_view(declval<S>()))>::value> {
};

template <typename S>
struct char_t {
    typedef decltype(to_string_view(declval<S>())) result;
    typedef typename result::char_type type;
};

template <typename Char>
struct named_arg_base;

template <typename T, typename Char>
struct named_arg;

enum type {
    none_type,
    named_arg_type,
    // Integer types should go first,
    int_type,
    uint_type,
    long_long_type,
    ulong_long_type,
    bool_type,
    char_type,
    last_integer_type = char_type,
    // followed by floating-point types.
    double_type,
    long_double_type,
    last_numeric_type = long_double_type,
    cstring_type,
    string_type,
    pointer_type,
    custom_type
};

FMT_CONSTEXPR bool is_integral(type t) {
    FMT_ASSERT(t != internal::named_arg_type, "invalid argument type");
    return t > internal::none_type && t <= internal::last_integer_type;
}

FMT_CONSTEXPR bool is_arithmetic(type t) {
    FMT_ASSERT(t != internal::named_arg_type, "invalid argument type");
    return t > internal::none_type && t <= internal::last_numeric_type;
}

template <typename Char>
struct string_value {
    const Char* value;
    std::size_t size;
};

template <typename Context>
struct custom_value {
    const void* value;
    void (*format)(const void* arg, Context& ctx);
};

// A formatting argument value.
template <typename Context>
class value {
  public:
    typedef typename Context::char_type char_type;

    union {
        int int_value;
        unsigned uint_value;
        long long long_long_value;
        unsigned long long ulong_long_value;
        double double_value;
        long double long_double_value;
        const void* pointer;
        string_value<char_type> string;
        string_value<signed char> sstring;
        string_value<unsigned char> ustring;
        custom_value<Context> custom;
    };

    FMT_CONSTEXPR value(int val = 0) : int_value(val) {}
    value(unsigned val) { uint_value = val; }
    value(long long val) { long_long_value = val; }
    value(unsigned long long val) { ulong_long_value = val; }
    value(double val) { double_value = val; }
    value(long double val) { long_double_value = val; }
    value(const char_type* val) { string.value = val; }
    value(const signed char* val) {
        static_assert(std::is_same<char, char_type>::value,
                      "incompatible string types");
        sstring.value = val;
    }
    value(const unsigned char* val) {
        static_assert(std::is_same<char, char_type>::value,
                      "incompatible string types");
        ustring.value = val;
    }
    value(basic_string_view<char_type> val) {
        string.value = val.data();
        string.size = val.size();
    }
    value(const void* val) { pointer = val; }

    template <typename T>
    explicit value(const T& val) {
        custom.value = &val;
        custom.format = &format_custom_arg<T>;
    }

    const named_arg_base<char_type>& as_named_arg() {
        return *static_cast<const named_arg_base<char_type>*>(pointer);
    }

  private:
    // Formats an argument of a custom type, such as a user-defined class.
    template <typename T>
    static void format_custom_arg(const void* arg, Context& ctx) {
        // Get the formatter type through the context to allow different
        // contexts have different extension points, e.g. `formatter<T>` for
        // `format` and `printf_formatter<T>` for `printf`.
        typename Context::template formatter_type<T>::type f;
        auto&& parse_ctx = ctx.parse_context();
        parse_ctx.advance_to(f.parse(parse_ctx));
        ctx.advance_to(f.format(*static_cast<const T*>(arg), ctx));
    }
};

// Value initializer used to delay conversion to value and reduce memory churn.
template <typename Context, typename T, type TYPE>
struct init {
    T val;
    static const type type_tag = TYPE;

    FMT_CONSTEXPR init(const T& v) : val(v) {}
    FMT_CONSTEXPR operator value<Context>() const {
        return value<Context>(val);
    }
};

template <typename Context, typename T>
FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T& value);

#define FMT_MAKE_VALUE(TAG, ArgType, ValueType)                                \
    template <typename C>                                                      \
    FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) {            \
        return static_cast<ValueType>(val);                                    \
    }

#define FMT_MAKE_VALUE_SAME(TAG, Type)                                         \
    template <typename C>                                                      \
    FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) {                    \
        return val;                                                            \
    }

FMT_MAKE_VALUE(bool_type, bool, int)
FMT_MAKE_VALUE(int_type, short, int)
FMT_MAKE_VALUE(uint_type, unsigned short, unsigned)
FMT_MAKE_VALUE_SAME(int_type, int)
FMT_MAKE_VALUE_SAME(uint_type, unsigned)

// To minimize the number of types we need to deal with, long is translated
// either to int or to long long depending on its size.
typedef std::conditional<sizeof(long) == sizeof(int), int, long long>::type
    long_type;
FMT_MAKE_VALUE((sizeof(long) == sizeof(int) ? int_type : long_long_type), long,
               long_type)
typedef std::conditional<sizeof(unsigned long) == sizeof(unsigned), unsigned,
                         unsigned long long>::type ulong_type;
FMT_MAKE_VALUE((sizeof(unsigned long) == sizeof(unsigned) ? uint_type
                                                          : ulong_long_type),
               unsigned long, ulong_type)

FMT_MAKE_VALUE_SAME(long_long_type, long long)
FMT_MAKE_VALUE_SAME(ulong_long_type, unsigned long long)
FMT_MAKE_VALUE(int_type, signed char, int)
FMT_MAKE_VALUE(uint_type, unsigned char, unsigned)

// This doesn't use FMT_MAKE_VALUE because of ambiguity in gcc 4.4.
template <typename C, typename Char>
FMT_CONSTEXPR
    typename std::enable_if<std::is_same<typename C::char_type, Char>::value,
                            init<C, int, char_type>>::type
    make_value(Char val) {
    return val;
}

template <typename C>
FMT_CONSTEXPR
    typename std::enable_if<!std::is_same<typename C::char_type, char>::value,
                            init<C, int, char_type>>::type
    make_value(char val) {
    return val;
}

FMT_MAKE_VALUE(double_type, float, double)
FMT_MAKE_VALUE_SAME(double_type, double)
FMT_MAKE_VALUE_SAME(long_double_type, long double)

// Formatting of wide strings into a narrow buffer and multibyte strings
// into a wide buffer is disallowed (https://github.com/fmtlib/fmt/pull/606).
FMT_MAKE_VALUE(cstring_type, typename C::char_type*,
               const typename C::char_type*)
FMT_MAKE_VALUE(cstring_type, const typename C::char_type*,
               const typename C::char_type*)

FMT_MAKE_VALUE(cstring_type, signed char*, const signed char*)
FMT_MAKE_VALUE_SAME(cstring_type, const signed char*)
FMT_MAKE_VALUE(cstring_type, unsigned char*, const unsigned char*)
FMT_MAKE_VALUE_SAME(cstring_type, const unsigned char*)
FMT_MAKE_VALUE_SAME(string_type, basic_string_view<typename C::char_type>)
FMT_MAKE_VALUE(string_type,
               typename basic_string_view<typename C::char_type>::type,
               basic_string_view<typename C::char_type>)
FMT_MAKE_VALUE(string_type, const std::basic_string<typename C::char_type>&,
               basic_string_view<typename C::char_type>)
FMT_MAKE_VALUE(pointer_type, void*, const void*)
FMT_MAKE_VALUE_SAME(pointer_type, const void*)

#if FMT_USE_NULLPTR
FMT_MAKE_VALUE(pointer_type, std::nullptr_t, const void*)
#endif

// Formatting of arbitrary pointers is disallowed. If you want to output a
// pointer cast it to "void *" or "const void *". In particular, this forbids
// formatting of "[const] volatile char *" which is printed as bool by
// iostreams.
template <typename C, typename T>
typename std::enable_if<!std::is_same<T, typename C::char_type>::value>::type
make_value(const T*) {
    static_assert(!sizeof(T), "formatting of non-void pointers is disallowed");
}

template <typename C, typename T>
inline
    typename std::enable_if<std::is_enum<T>::value &&
                                convert_to_int<T, typename C::char_type>::value,
                            init<C, int, int_type>>::type
    make_value(const T& val) {
    return static_cast<int>(val);
}

template <typename C, typename T, typename Char = typename C::char_type>
inline typename std::enable_if<
    is_constructible<basic_string_view<Char>, T>::value &&
        !internal::is_string<T>::value,
    init<C, basic_string_view<Char>, string_type>>::type
make_value(const T& val) {
    return basic_string_view<Char>(val);
}

template <typename C, typename T, typename Char = typename C::char_type>
inline typename std::enable_if<
    !convert_to_int<T, Char>::value && !std::is_same<T, Char>::value &&
        !std::is_convertible<T, basic_string_view<Char>>::value &&
        !is_constructible<basic_string_view<Char>, T>::value &&
        !internal::is_string<T>::value,
    // Implicit conversion to std::string is not handled here because it's
    // unsafe: https://github.com/fmtlib/fmt/issues/729
    init<C, const T&, custom_type>>::type
make_value(const T& val) {
    return val;
}

template <typename C, typename T>
init<C, const void*, named_arg_type>
make_value(const named_arg<T, typename C::char_type>& val) {
    basic_format_arg<C> arg = make_arg<C>(val.value);
    std::memcpy(val.data, &arg, sizeof(arg));
    return static_cast<const void*>(&val);
}

template <typename C, typename S>
FMT_CONSTEXPR11 typename std::enable_if<
    internal::is_string<S>::value,
    init<C, basic_string_view<typename C::char_type>, string_type>>::type
make_value(const S& val) {
    // Handle adapted strings.
    static_assert(std::is_same<typename C::char_type,
                               typename internal::char_t<S>::type>::value,
                  "mismatch between char-types of context and argument");
    return to_string_view(val);
}

// Maximum number of arguments with packed types.
enum { max_packed_args = 15 };
enum : unsigned long long { is_unpacked_bit = 1ull << 63 };

template <typename Context>
class arg_map;
} // namespace internal

// A formatting argument. It is a trivially copyable/constructible type to
// allow storage in basic_memory_buffer.
template <typename Context>
class basic_format_arg {
  private:
    internal::value<Context> value_;
    internal::type type_;

    template <typename ContextType, typename T>
    friend FMT_CONSTEXPR basic_format_arg<ContextType>
    internal::make_arg(const T& value);

    template <typename Visitor, typename Ctx>
    friend FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
    visit_format_arg(Visitor&& vis, const basic_format_arg<Ctx>& arg);

    friend class basic_format_args<Context>;
    friend class internal::arg_map<Context>;

    typedef typename Context::char_type char_type;

  public:
    class handle {
      public:
        explicit handle(internal::custom_value<Context> custom)
            : custom_(custom) {}

        void format(Context& ctx) const { custom_.format(custom_.value, ctx); }

      private:
        internal::custom_value<Context> custom_;
    };

    FMT_CONSTEXPR basic_format_arg() : type_(internal::none_type) {}

    FMT_EXPLICIT operator bool() const FMT_NOEXCEPT {
        return type_ != internal::none_type;
    }

    internal::type type() const { return type_; }

    bool is_integral() const { return internal::is_integral(type_); }
    bool is_arithmetic() const { return internal::is_arithmetic(type_); }
};

struct monostate {};

/**
  \rst
  Visits an argument dispatching to the appropriate visit method based on
  the argument type. For example, if the argument type is ``double`` then
  ``vis(value)`` will be called with the value of type ``double``.
  \endrst
 */
template <typename Visitor, typename Context>
FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
visit_format_arg(Visitor&& vis, const basic_format_arg<Context>& arg) {
    typedef typename Context::char_type char_type;
    switch (arg.type_) {
        case internal::none_type:
            break;
        case internal::named_arg_type:
            FMT_ASSERT(false, "invalid argument type");
            break;
        case internal::int_type:
            return vis(arg.value_.int_value);
        case internal::uint_type:
            return vis(arg.value_.uint_value);
        case internal::long_long_type:
            return vis(arg.value_.long_long_value);
        case internal::ulong_long_type:
            return vis(arg.value_.ulong_long_value);
        case internal::bool_type:
            return vis(arg.value_.int_value != 0);
        case internal::char_type:
            return vis(static_cast<char_type>(arg.value_.int_value));
        case internal::double_type:
            return vis(arg.value_.double_value);
        case internal::long_double_type:
            return vis(arg.value_.long_double_value);
        case internal::cstring_type:
            return vis(arg.value_.string.value);
        case internal::string_type:
            return vis(basic_string_view<char_type>(arg.value_.string.value,
                                                    arg.value_.string.size));
        case internal::pointer_type:
            return vis(arg.value_.pointer);
        case internal::custom_type:
            return vis(
                typename basic_format_arg<Context>::handle(arg.value_.custom));
    }
    return vis(monostate());
}

// DEPRECATED!
template <typename Visitor, typename Context>
FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
visit(Visitor&& vis, const basic_format_arg<Context>& arg) {
    return visit_format_arg(std::forward<Visitor>(vis), arg);
}

// Parsing context consisting of a format string range being parsed and an
// argument counter for automatic indexing.
template <typename Char, typename ErrorHandler = internal::error_handler>
class basic_parse_context : private ErrorHandler {
  private:
    basic_string_view<Char> format_str_;
    int next_arg_id_;

  public:
    typedef Char char_type;
    typedef typename basic_string_view<Char>::iterator iterator;

    explicit FMT_CONSTEXPR
    basic_parse_context(basic_string_view<Char> format_str,
                        ErrorHandler eh = ErrorHandler())
        : ErrorHandler(eh), format_str_(format_str), next_arg_id_(0) {}

    // Returns an iterator to the beginning of the format string range being
    // parsed.
    FMT_CONSTEXPR iterator begin() const FMT_NOEXCEPT {
        return format_str_.begin();
    }

    // Returns an iterator past the end of the format string range being parsed.
    FMT_CONSTEXPR iterator end() const FMT_NOEXCEPT {
        return format_str_.end();
    }

    // Advances the begin iterator to ``it``.
    FMT_CONSTEXPR void advance_to(iterator it) {
        format_str_.remove_prefix(internal::to_unsigned(it - begin()));
    }

    // Returns the next argument index.
    FMT_CONSTEXPR unsigned next_arg_id();

    FMT_CONSTEXPR bool check_arg_id(unsigned) {
        if (next_arg_id_ > 0) {
            on_error(
                "cannot switch from automatic to manual argument indexing");
            return false;
        }
        next_arg_id_ = -1;
        return true;
    }
    void check_arg_id(basic_string_view<Char>) {}

    FMT_CONSTEXPR void on_error(const char* message) {
        ErrorHandler::on_error(message);
    }

    FMT_CONSTEXPR ErrorHandler error_handler() const { return *this; }
};

typedef basic_parse_context<char> format_parse_context;
typedef basic_parse_context<wchar_t> wformat_parse_context;

// DEPRECATED!
typedef basic_parse_context<char> parse_context;
typedef basic_parse_context<wchar_t> wparse_context;

namespace internal {
// A map from argument names to their values for named arguments.
template <typename Context>
class arg_map {
  private:
    arg_map(const arg_map&) = delete;
    void operator=(const arg_map&) = delete;

    typedef typename Context::char_type char_type;

    struct entry {
        basic_string_view<char_type> name;
        basic_format_arg<Context> arg;
    };

    entry* map_;
    unsigned size_;

    void push_back(value<Context> val) {
        const internal::named_arg_base<char_type>& named = val.as_named_arg();
        map_[size_] = entry{named.name, named.template deserialize<Context>()};
        ++size_;
    }

  public:
    arg_map() : map_(FMT_NULL), size_(0) {}
    void init(const basic_format_args<Context>& args);
    ~arg_map() { delete[] map_; }

    basic_format_arg<Context> find(basic_string_view<char_type> name) const {
        // The list is unsorted, so just return the first matching name.
        for (entry *it = map_, *end = map_ + size_; it != end; ++it) {
            if (it->name == name)
                return it->arg;
        }
        return {};
    }
};

// A type-erased reference to an std::locale to avoid heavy <locale> include.
class locale_ref {
  private:
    const void* locale_; // A type-erased pointer to std::locale.
    friend class locale;

  public:
    locale_ref() : locale_(FMT_NULL) {}

    template <typename Locale>
    explicit locale_ref(const Locale& loc);

    template <typename Locale>
    Locale get() const;
};

template <typename OutputIt, typename Context, typename Char>
class context_base {
  public:
    typedef OutputIt iterator;

  private:
    basic_parse_context<Char> parse_context_;
    iterator out_;
    basic_format_args<Context> args_;
    locale_ref loc_;

  protected:
    typedef Char char_type;
    typedef basic_format_arg<Context> format_arg;

    context_base(OutputIt out, basic_string_view<char_type> format_str,
                 basic_format_args<Context> ctx_args,
                 locale_ref loc = locale_ref())
        : parse_context_(format_str), out_(out), args_(ctx_args), loc_(loc) {}

    // Returns the argument with specified index.
    format_arg do_get_arg(unsigned arg_id) {
        format_arg arg = args_.get(arg_id);
        if (!arg)
            parse_context_.on_error("argument index out of range");
        return arg;
    }

    // Checks if manual indexing is used and returns the argument with
    // specified index.
    format_arg get_arg(unsigned arg_id) {
        return this->parse_context().check_arg_id(arg_id)
                   ? this->do_get_arg(arg_id)
                   : format_arg();
    }

  public:
    basic_parse_context<char_type>& parse_context() { return parse_context_; }
    basic_format_args<Context> args() const { return args_; } // DEPRECATED!
    basic_format_arg<Context> arg(unsigned id) const { return args_.get(id); }

    internal::error_handler error_handler() {
        return parse_context_.error_handler();
    }

    void on_error(const char* message) { parse_context_.on_error(message); }

    // Returns an iterator to the beginning of the output range.
    iterator out() { return out_; }
    iterator begin() { return out_; } // deprecated

    // Advances the begin iterator to ``it``.
    void advance_to(iterator it) { out_ = it; }

    locale_ref locale() { return loc_; }
};

template <typename Context, typename T>
struct get_type {
    typedef decltype(make_value<Context>(
        declval<typename std::decay<T>::type&>())) value_type;
    static const type value = value_type::type_tag;
};

template <typename Context>
FMT_CONSTEXPR11 unsigned long long get_types() {
    return 0;
}

template <typename Context, typename Arg, typename... Args>
FMT_CONSTEXPR11 unsigned long long get_types() {
    return get_type<Context, Arg>::value | (get_types<Context, Args...>() << 4);
}

template <typename Context, typename T>
FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T& value) {
    basic_format_arg<Context> arg;
    arg.type_ = get_type<Context, T>::value;
    arg.value_ = make_value<Context>(value);
    return arg;
}

template <bool IS_PACKED, typename Context, typename T>
inline typename std::enable_if<IS_PACKED, value<Context>>::type
make_arg(const T& value) {
    return make_value<Context>(value);
}

template <bool IS_PACKED, typename Context, typename T>
inline typename std::enable_if<!IS_PACKED, basic_format_arg<Context>>::type
make_arg(const T& value) {
    return make_arg<Context>(value);
}
} // namespace internal

// Formatting context.
template <typename OutputIt, typename Char>
class basic_format_context
    : public internal::context_base<
          OutputIt, basic_format_context<OutputIt, Char>, Char> {
  public:
    /** The character type for the output. */
    typedef Char char_type;

    // using formatter_type = formatter<T, char_type>;
    template <typename T>
    struct formatter_type {
        typedef formatter<T, char_type> type;
    };

  private:
    internal::arg_map<basic_format_context> map_;

    basic_format_context(const basic_format_context&) = delete;
    void operator=(const basic_format_context&) = delete;

    typedef internal::context_base<OutputIt, basic_format_context, Char> base;
    typedef typename base::format_arg format_arg;
    using base::get_arg;

  public:
    using typename base::iterator;

    /**
     Constructs a ``basic_format_context`` object. References to the arguments
     are stored in the object so make sure they have appropriate lifetimes.
     */
    basic_format_context(OutputIt out, basic_string_view<char_type> format_str,
                         basic_format_args<basic_format_context> ctx_args,
                         internal::locale_ref loc = internal::locale_ref())
        : base(out, format_str, ctx_args, loc) {}

    format_arg next_arg() {
        return this->do_get_arg(this->parse_context().next_arg_id());
    }
    format_arg get_arg(unsigned arg_id) { return this->do_get_arg(arg_id); }

    // Checks if manual indexing is used and returns the argument with the
    // specified name.
    format_arg get_arg(basic_string_view<char_type> name);
};

template <typename Char>
struct buffer_context {
    typedef basic_format_context<
        std::back_insert_iterator<internal::basic_buffer<Char>>, Char>
        type;
};
typedef buffer_context<char>::type format_context;
typedef buffer_context<wchar_t>::type wformat_context;

/**
  \rst
  An array of references to arguments. It can be implicitly converted into
  `~fmt::basic_format_args` for passing into type-erased formatting functions
  such as `~fmt::vformat`.
  \endrst
 */
template <typename Context, typename... Args>
class format_arg_store {
  private:
    static const size_t NUM_ARGS = sizeof...(Args);

    // Packed is a macro on MinGW so use IS_PACKED instead.
    static const bool IS_PACKED = NUM_ARGS < internal::max_packed_args;

    typedef
        typename std::conditional<IS_PACKED, internal::value<Context>,
                                  basic_format_arg<Context>>::type value_type;

    // If the arguments are not packed, add one more element to mark the end.
    static const size_t DATA_SIZE =
        NUM_ARGS + (IS_PACKED && NUM_ARGS != 0 ? 0 : 1);
    value_type data_[DATA_SIZE];

    friend class basic_format_args<Context>;

    static FMT_CONSTEXPR11 unsigned long long get_types() {
        return IS_PACKED ? internal::get_types<Context, Args...>()
                         : internal::is_unpacked_bit | NUM_ARGS;
    }

  public:
#if FMT_USE_CONSTEXPR11
    static FMT_CONSTEXPR11 unsigned long long TYPES = get_types();
#else
    static const unsigned long long TYPES;
#endif

#if (FMT_GCC_VERSION && FMT_GCC_VERSION <= 405) ||                             \
    (FMT_MSC_VER && FMT_MSC_VER <= 1800)
    // Workaround array initialization issues in gcc <= 4.5 and MSVC <= 2013.
    format_arg_store(const Args&... args) {
        value_type init[DATA_SIZE] = {
            internal::make_arg<IS_PACKED, Context>(args)...};
        std::memcpy(data_, init, sizeof(init));
    }
#else
    format_arg_store(const Args&... args)
        : data_{internal::make_arg<IS_PACKED, Context>(args)...} {}
#endif
};

#if !FMT_USE_CONSTEXPR11
template <typename Context, typename... Args>
const unsigned long long
    format_arg_store<Context, Args...>::TYPES = get_types();
#endif

/**
  \rst
  Constructs an `~fmt::format_arg_store` object that contains references to
  arguments and can be implicitly converted to `~fmt::format_args`. `Context`
  can be omitted in which case it defaults to `~fmt::context`.
  \endrst
 */
template <typename Context = format_context, typename... Args>
inline format_arg_store<Context, Args...>
make_format_args(const Args&... args) {
    return {args...};
}

/** Formatting arguments. */
template <typename Context>
class basic_format_args {
  public:
    typedef unsigned size_type;
    typedef basic_format_arg<Context> format_arg;

  private:
    // To reduce compiled code size per formatting function call, types of first
    // max_packed_args arguments are passed in the types_ field.
    unsigned long long types_;
    union {
        // If the number of arguments is less than max_packed_args, the argument
        // values are stored in values_, otherwise they are stored in args_.
        // This is done to reduce compiled code size as storing larger objects
        // may require more code (at least on x86-64) even if the same amount of
        // data is actually copied to stack. It saves ~10% on the bloat test.
        const internal::value<Context>* values_;
        const format_arg* args_;
    };

    bool is_packed() const { return (types_ & internal::is_unpacked_bit) == 0; }

    typename internal::type type(unsigned index) const {
        unsigned shift = index * 4;
        return static_cast<typename internal::type>(
            (types_ & (0xfull << shift)) >> shift);
    }

    friend class internal::arg_map<Context>;

    void set_data(const internal::value<Context>* values) { values_ = values; }
    void set_data(const format_arg* args) { args_ = args; }

    format_arg do_get(size_type index) const {
        format_arg arg;
        if (!is_packed()) {
            auto num_args = max_size();
            if (index < num_args)
                arg = args_[index];
            return arg;
        }
        if (index > internal::max_packed_args)
            return arg;
        arg.type_ = type(index);
        if (arg.type_ == internal::none_type)
            return arg;
        internal::value<Context>& val = arg.value_;
        val = values_[index];
        return arg;
    }

  public:
    basic_format_args() : types_(0) {}

    /**
     \rst
     Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
     \endrst
     */
    template <typename... Args>
    basic_format_args(const format_arg_store<Context, Args...>& store)
        : types_(static_cast<unsigned long long>(store.TYPES)) {
        set_data(store.data_);
    }

    /**
     \rst
     Constructs a `basic_format_args` object from a dynamic set of arguments.
     \endrst
     */
    basic_format_args(const format_arg* args, size_type count)
        : types_(internal::is_unpacked_bit | count) {
        set_data(args);
    }

    /** Returns the argument at specified index. */
    format_arg get(size_type index) const {
        format_arg arg = do_get(index);
        if (arg.type_ == internal::named_arg_type)
            arg = arg.value_.as_named_arg().template deserialize<Context>();
        return arg;
    }

    size_type max_size() const {
        unsigned long long max_packed = internal::max_packed_args;
        return static_cast<size_type>(
            is_packed() ? max_packed : types_ & ~internal::is_unpacked_bit);
    }
};

/** An alias to ``basic_format_args<context>``. */
// It is a separate type rather than a typedef to make symbols readable.
struct format_args : basic_format_args<format_context> {
    template <typename... Args>
    format_args(Args&&... arg)
        : basic_format_args<format_context>(std::forward<Args>(arg)...) {}
};
struct wformat_args : basic_format_args<wformat_context> {
    template <typename... Args>
    wformat_args(Args&&... arg)
        : basic_format_args<wformat_context>(std::forward<Args>(arg)...) {}
};

#define FMT_ENABLE_IF_T(B, T) typename std::enable_if<B, T>::type

#ifndef FMT_USE_ALIAS_TEMPLATES
#define FMT_USE_ALIAS_TEMPLATES FMT_HAS_FEATURE(cxx_alias_templates)
#endif
#if FMT_USE_ALIAS_TEMPLATES
/** String's character type. */
template <typename S>
using char_t = FMT_ENABLE_IF_T(internal::is_string<S>::value,
                               typename internal::char_t<S>::type);
#define FMT_CHAR(S) fmt::char_t<S>
#else
template <typename S>
struct char_t : std::enable_if<internal::is_string<S>::value,
                               typename internal::char_t<S>::type> {};
#define FMT_CHAR(S) typename char_t<S>::type
#endif

namespace internal {
template <typename Char>
struct named_arg_base {
    basic_string_view<Char> name;

    // Serialized value<context>.
    mutable char
        data[sizeof(basic_format_arg<typename buffer_context<Char>::type>)];

    named_arg_base(basic_string_view<Char> nm) : name(nm) {}

    template <typename Context>
    basic_format_arg<Context> deserialize() const {
        basic_format_arg<Context> arg;
        std::memcpy(&arg, data, sizeof(basic_format_arg<Context>));
        return arg;
    }
};

template <typename T, typename Char>
struct named_arg : named_arg_base<Char> {
    const T& value;

    named_arg(basic_string_view<Char> name, const T& val)
        : named_arg_base<Char>(name), value(val) {}
};

template <typename... Args, typename S>
inline typename std::enable_if<!is_compile_string<S>::value>::type
check_format_string(const S&) {}
template <typename... Args, typename S>
typename std::enable_if<is_compile_string<S>::value>::type
    check_format_string(S);

template <typename S, typename... Args>
struct checked_args
    : format_arg_store<typename buffer_context<FMT_CHAR(S)>::type, Args...> {
    typedef typename buffer_context<FMT_CHAR(S)>::type context;

    checked_args(const S& format_str, const Args&... args)
        : format_arg_store<context, Args...>(args...) {
        internal::check_format_string<Args...>(format_str);
    }

    basic_format_args<context> operator*() const { return *this; }
};

template <typename Char>
std::basic_string<Char>
vformat(basic_string_view<Char> format_str,
        basic_format_args<typename buffer_context<Char>::type> args);

template <typename Char>
typename buffer_context<Char>::type::iterator
vformat_to(internal::basic_buffer<Char>& buf,
           basic_string_view<Char> format_str,
           basic_format_args<typename buffer_context<Char>::type> args);
} // namespace internal

/**
  \rst
  Returns a named argument to be used in a formatting function.

  **Example**::

    fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
  \endrst
 */
template <typename T>
inline internal::named_arg<T, char> arg(string_view name, const T& arg) {
    return {name, arg};
}

template <typename T>
inline internal::named_arg<T, wchar_t> arg(wstring_view name, const T& arg) {
    return {name, arg};
}

// Disable nested named arguments, e.g. ``arg("a", arg("b", 42))``.
template <typename S, typename T, typename Char>
void arg(S, internal::named_arg<T, Char>) = delete;

template <typename Container>
struct is_contiguous : std::false_type {};

template <typename Char>
struct is_contiguous<std::basic_string<Char>> : std::true_type {};

template <typename Char>
struct is_contiguous<internal::basic_buffer<Char>> : std::true_type {};

/** Formats a string and writes the output to ``out``. */
template <typename Container, typename S>
typename std::enable_if<is_contiguous<Container>::value,
                        std::back_insert_iterator<Container>>::type
vformat_to(std::back_insert_iterator<Container> out, const S& format_str,
           basic_format_args<typename buffer_context<FMT_CHAR(S)>::type> args) {
    internal::container_buffer<Container> buf(internal::get_container(out));
    internal::vformat_to(buf, to_string_view(format_str), args);
    return out;
}

template <typename Container, typename S, typename... Args>
inline typename std::enable_if<is_contiguous<Container>::value &&
                                   internal::is_string<S>::value,
                               std::back_insert_iterator<Container>>::type
format_to(std::back_insert_iterator<Container> out, const S& format_str,
          const Args&... args) {
    internal::checked_args<S, Args...> ca(format_str, args...);
    return vformat_to(out, to_string_view(format_str), *ca);
}

template <typename S, typename Char = FMT_CHAR(S)>
inline std::basic_string<Char>
vformat(const S& format_str,
        basic_format_args<typename buffer_context<Char>::type> args) {
    return internal::vformat(to_string_view(format_str), args);
}

/**
  \rst
  Formats arguments and returns the result as a string.

  **Example**::

    #include <fmt/core.h>
    std::string message = fmt::format("The answer is {}", 42);
  \endrst
*/
template <typename S, typename... Args>
inline std::basic_string<FMT_CHAR(S)> format(const S& format_str,
                                             const Args&... args) {
    return internal::vformat(
        to_string_view(format_str),
        *internal::checked_args<S, Args...>(format_str, args...));
}

FMT_API void vprint(std::FILE* f, string_view format_str, format_args args);
FMT_API void vprint(std::FILE* f, wstring_view format_str, wformat_args args);

/**
  \rst
  Prints formatted data to the file *f*. For wide format strings,
  *f* should be in wide-oriented mode set via ``fwide(f, 1)`` or
  ``_setmode(_fileno(f), _O_U8TEXT)`` on Windows.

  **Example**::

    fmt::print(stderr, "Don't {}!", "panic");
  \endrst
 */
template <typename S, typename... Args>
inline FMT_ENABLE_IF_T(internal::is_string<S>::value, void)
    print(std::FILE* f, const S& format_str, const Args&... args) {
    vprint(f, to_string_view(format_str),
           internal::checked_args<S, Args...>(format_str, args...));
}

FMT_API void vprint(string_view format_str, format_args args);
FMT_API void vprint(wstring_view format_str, wformat_args args);

/**
  \rst
  Prints formatted data to ``stdout``.

  **Example**::

    fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
  \endrst
 */
template <typename S, typename... Args>
inline FMT_ENABLE_IF_T(internal::is_string<S>::value, void)
    print(const S& format_str, const Args&... args) {
    vprint(to_string_view(format_str),
           internal::checked_args<S, Args...>(format_str, args...));
}
FMT_END_NAMESPACE

#endif // FMT_CORE_H_
